But even if Arrow doesn't work out as a lock, just look at TPJ's upward progression, he is going to be an absolute star.
And when it comes to Bird, as good as he is (and he really is good), let's not kid ourselves here. If he were to come to play lock at the Broncs, he doesn't have anymore game experience in the forwards than either of Arrow or TPJ, so that argument doesn't really work as he has made his name in the backs.
I'm not saying he couldn't make the transition but we would be paying a bucket load more for him as an unknown quantity compared to the much cheaper guys we already have that have shown something.